Wil*_*lis 9 java android android-listview custom-adapter
我通过一个很好的教程,进行了一些更改,创建了一个自定义ListView,它允许我为ListView中的每一行显示多个图像.我想要做的是通过选择列表中的多个项目来突出显示,然后通过在我的选项菜单上选择一个选项,对所有这些列表项执行某种操作.但是,我似乎遇到的问题是我无法选择多个项目,即使我已经添加android:choiceMode="multipleChoice"到.xml文件中的ListView.我意识到这可以使用复选框或单选按钮完成,但我宁愿避免这种情况.我在下面附上了我的源代码.任何帮助,将不胜感激.最后,感谢http://custom-android-dn.blogspot.com/提供了一个很棒的教程.谢谢.
CustomlistviewActivity.java
package DucNguyen.example.customlistview;
public class CustomlistviewActivity extends Activity {
private ListView listViewFootballLegend;
private Context ctx;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_customlistview);
ctx=this;
List<FootballLegend> legendList= new ArrayList<FootballLegend>();
legendList.add(new FootballLegend("Pele","October 23, 1940 (age 72)","pele","brazil"));
legendList.add(new FootballLegend("Diego Maradona","October 30, 1960 (age 52)","maradona","argentina"));
legendList.add(new FootballLegend("Johan Cruyff","April 25, 1947 (age 65)","cruyff","netherlands"));
legendList.add(new FootballLegend("Franz Beckenbauer","September 11, 1945 (age 67)","beckenbauer","germany"));
legendList.add(new FootballLegend("Michel Platini","June 21, 1955 (age 57)","platini","france"));
legendList.add(new FootballLegend("Ronaldo De Lima","September 22, 1976 (age 36)","ronaldo","brazil"));
listViewFootballLegend = ( ListView ) findViewById( R.id.FootballLegend_list);
listViewFootballLegend.setAdapter( new FootballLegendListAdapter(ctx, R.layout.legend_row_item, legendList ) );
// Click event for single list row
listViewFootballLegend.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
FootballLegend o = (FootballLegend) parent.getItemAtPosition(position);
Toast.makeText(CustomlistviewActivity.this, o.getName().toString(), Toast.LENGTH_SHORT).show();
}
});
}
}
FootballLegendListAdapter.java
package DucNguyen.example.customlistview;
public class FootballLegendListAdapter extends ArrayAdapter<FootballLegend> {
private int resource;
private LayoutInflater inflater;
private Context context;
public FootballLegendListAdapter ( Context ctx, int resourceId, List<FootballLegend> objects) {
super( ctx, resourceId, objects );
resource = resourceId;
inflater = LayoutInflater.from( ctx );
context=ctx;
}
@Override
public View getView ( int position, View convertView, ViewGroup parent ) {
convertView = ( RelativeLayout ) inflater.inflate( resource, null );
FootballLegend Legend = getItem( position );
TextView legendName = (TextView) convertView.findViewById(R.id.legendName);
legendName.setText(Legend.getName());
TextView legendBorn = (TextView) convertView.findViewById(R.id.legendBorn);
legendBorn.setText(Legend.getNick());
ImageView legendImage = (ImageView) convertView.findViewById(R.id.legendImage);
String uri = "drawable/" + Legend.getImage();
int imageResource = context.getResources().getIdentifier(uri, null, context.getPackageName());
Drawable image = context.getResources().getDrawable(imageResource);
legendImage.setImageDrawable(image);
ImageView NationImage = (ImageView) convertView.findViewById(R.id.Nation);
uri = "drawable/" + Legend.getNation();
imageResource = context.getResources().getIdentifier(uri, null, context.getPackageName());
image = context.getResources().getDrawable(imageResource);
NationImage.setImageDrawable(image);
return convertView;
}
}
FootballLegend.java
package DucNguyen.example.customlistview;
public class FootballLegend {
public FootballLegend(String name, String born, String image, String nation) {
super();
this.name = name;
this.born = born;
this.image = image;
this.nation = nation;
}
private String name;
private String born;
private String image;
private String nation;
public String getName() {
return name;
}
public void setName(String nameText) {
name = nameText;
}
public String getNick() {
return born;
}
public void setNick(String born) {
this.born = born;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getNation() {
return nation;
}
public void setNation(String image) {
this.image = nation;
}
}
legend_row_item.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="5dip" >
<!-- ListRow Left side Thumbnail image -->
<LinearLayout android:id="@+id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="3dip"
android:layout_alignParentLeft="true"
android:layout_marginRight="5dip">
<ImageView
android:id="@+id/legendImage"
android:layout_width="50dip"
android:layout_height="50dip" />
</LinearLayout>
<TextView
android:id="@+id/legendName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:textColor="#040404"
android:typeface="sans"
android:textSize="15dip"
android:textStyle="bold"/>
<TextView
android:id="@+id/legendBorn"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/legendName"
android:textColor="#343434"
android:textSize="10dip"
android:layout_marginTop="1dip"
android:layout_toRightOf="@+id/thumbnail" />
<ImageView
android:id="@+id/Nation"
android:layout_width="45dp"
android:layout_height="30dp"
android:layout_alignParentRight="true"
android:layout_marginRight="5dp"
android:layout_centerVertical="true" />
</RelativeLayout>
activity_customlistview.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/FootballLegend_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingTop="5dp"
android:choiceMode="multipleChoice" >
</ListView>
</LinearLayout>
View您将在列表中显示的每个项目的根必须实现Checkable.实现此接口时,还会更新View的可绘制状态.请参阅此答案以了解如何执行此操作.
将<selector>drawable 设置为此根的背景View.检查状态和正常状态有哪些不同的颜色/可绘制.
将ListView选择模式设置为单选或多选.
在列表适配器中,使用上面创建的View作为父布局提供项目视图.
现在,ListView将负责在其项目视图上设置已选中/未选中状态.您也可以打电话getCheckedItemIds()或getCheckedItemPositions()打开ListView以获取当前选定的项目.